Thumb appliance



FIG. 1 is an isometric view showing the exterior of one side, part of the top and part of the interior of the other side of the thumb appliance, exploded from the thumb of the user;

FIG. 2 is an isometric view of part of the front, part of the exterior of one side and part of the interior of the other side of the thumb appliance;

FIG. 3 is a side elevation view of the thumb appliance, the other side being the mirror image thereof;

FIG. 4 is a bottom elevation view of the thumb appliance;

FIG. 5 is a top elevation view of the thumb appliance;

FIG. 6 is a front elevation view of the thumb appliance; and,

FIG. 7 is a rear elevation view of the thumb appliance.

The thumb shown in dot and dash in FIG. 1 forms no part of the invention. 

The ornamental design for a thumb appliance, substantially as shown and described. 